This adapter allows to use a 12V Hychika battery from a drill (https://www.amazon.de/gp/product/B08NB15B8B), that I got for very cheap to be used as a 12v power supply. I use it for my Creality CR Lizard.
Of course you need cables and connectors of your choice for the electrical connections.
I also included *.stp files and the scan of the battery itself.
The author hasn't provided the model origin yet.